import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from './components/Login.vue'
import Home from './components/Home.vue'
import Welcome from './components/Welcome.vue'
import Users from './components/user/Users.vue'
import Rights from './components/power/Rights.vue'
import Roles from './components/power/Roles.vue'
import Cate from './components/goods/Cate.vue'
import Params from './components/goods/params.vue'
import GoodsList from './components/goods/List.vue'
import Order from './components/order/order.vue'
import Reports from './components/report/Report.vue'
import Add from './components/goods/add.vue'

Vue.use(VueRouter)


const routes = [{
    path: '/',
    redirect: '/login'
}, {
    path: '/login',
    component: Login
}, {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children: [{
        path: '/welcome',
        component: Welcome
    }, {
        path: '/users',
        component: Users
    }, {
        path: '/rights',
        component: Rights
    }, {
        path: '/roles',
        component: Roles
    }, {
        path: '/categories',
        component: Cate
    }, {
        path: '/params',
        component: Params
    }, {
        path: '/orders',
        component: Order
    }, {
        path: '/reports',
        component: Reports
    }, {
        path: '/goods',
        component: GoodsList,
    }, {
        path: '/goods/add',
        component: Add,
    }]
}]

const router = new VueRouter({
    routes
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
    // to表示将要访问的路径
    // from表示从哪个路径跳转而来
    // next是一个函数，表示放行
    // next() 放行  或者  next('/login') 强制跳转
    // 如果访问的是登录页面，就直接放行
    if (to.path === '/login')
        return next();

    //获取token
    const tokenStr = window.sessionStorage.getItem('token');

    // 判断token值是否为空，如果有token值就允许放行，没有就强制跳转到登录页面

    if (!tokenStr)
        return next('/login');
    next();
})

export default router